Cesium carbonate → 2,3-Dichloro-5-(2,2-diethoxyethoxy)pyridine

関与物質

反応条件

反応手順

Bromoacetaldehyde diethyl acetal (2.74 ml, 18.3 mmol) and cesium carbonate (9.93 g, 30.5 mmol) were added to an N,N-dimethylacetamide solution (10 ml) of 5,6-dichloropyridin-3-ol (1.0 g, 6.10 mmol), and stirred under a nitrogen atmosphere at 100° C. for 16 hours. Saline solution and ethyl acetate were added to the reaction solution, the organic layer was washed with water, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (Biotage, hexane:ethyl acetate=11:1 to 9:1) to obtain 2,3-dichloro-5-(2,2-diethoxyethoxy)pyridine (1.51 g, yield: 88%) as an orange oil.

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